explain_getrusage_or_die - get resource usage and report errors

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                                     explain_getrusage_or_die(3)

       The  explain_getrusage_or_die  function  is  used  to  call  the  getrusage(2) system call. On failure an
       explanation will be printed to stderr, obtained from the  explain_getrusage(3)  function,  and  then  the
       process terminates by calling exit(EXIT_FAILURE).

       The  explain_getrusage_on_error  function  is  used  to  call the getrusage(2) system call. On failure an
       explanation will be printed to stderr, obtained from the explain_getrusage(3) function, but still returns
       to the caller.

       who     The who, exactly as to be passed to the getrusage(2) system call.

       usage   The usage, exactly as to be passed to the getrusage(2) system call.

       The explain_getrusage_or_die function is intended to be used  in  a  fashion  similar  to  the  following
       example:
              explain_getrusage_or_die(who, usage);

       explain_getrusage_or_die - get resource usage and report errors

       The explain_getrusage_or_die function only returns on success, see getrusage(2) for more information.  On
       failure, prints an explanation and exits, it does not return.

       The  explain_getrusage_on_error  function  always  returns  the  value return by the wrapped getrusage(2)
       system call.

getrusage(2)
               get resource usage

       explain_getrusage(3)
               explain getrusage(2) errors

       exit(2) terminate the calling process

       #include <libexplain/getrusage.h>
       void explain_getrusage_or_die(int who, struct rusage *usage);
       int explain_getrusage_on_error(int who, struct rusage *usage);